Most serious gun owners & armed professionals(EP agents, LE officers, security industry) prefer the unlined holsters.
I'd heard that lined styles can draw in dust, dirt, grit etc.
They may also retain moisture or hold water if you wear the firearm in bad weather(snow, rain, sleet).
I'd buy an unlined holster. If you plan to keep the .357 revolver you might want to get it treated with NP3+, Black-T or Bearcoat. It will protect the firearm & improve cleaning/service.
www.black-t.com www.Robarguns.com www.bearcoat.com